I've been trying to replay Final Fantasy Tactics Advance 2, but I keep getting the following message: "The save data cannot be accessed. Please turn the power OFF and reinsert the Game Card." I'm using the paid version r2.5.0.3a build 89 of the emulator on Android.

I've looked for solutions on the web, but only managed to find a change in the backup media cartridge on Desmune... which does not seem to apply to Drastic. What steps I can possibly take to make it work on Drastic?